Zero Voltage Switching Chipset Enables Up To 50% Smaller PSUs at 100W Power Levels and Low BOM Cost

Dialog Semiconductor announced digital Zero Voltage Switching (ZVS) chipset to enable 100 Watt and beyond High Power Density (HPD) Power Supply Units (PSUs) that are 30-50% smaller than conventional high power PSUs. Zero Voltage Switching chipset includes the iW9801 primary-side controller and the iW709 secondary-side USB PD protocol IC. With ZVS chipset, designers can reduce component size and BOM cost to enable smaller form-factor, lighter weight power supplies, including travel adapters for smartphones, tablets, laptops, power tools, and other portable devices.

ZVS RapidCharge solution provides seamless multi-mode control for up to 94% efficiency and eliminates audible noise for high power charging with safe, cool operation in a small physical charger size. Its low standby power of less than 20mW delivers an eco-friendly solution. The chipset offers robust protection for over-voltage (OVP), over-current (OCP), user-configurable over-temperature, shoot-through, brown-in/brown-out VSENSE/ISENSE short, output short, and extra primary-side OCP and OVP. Its secondary-side digital compensation loop ensures stability and eliminates the need for extra compensation components. The integrated synchronous rectifier controller in the secondary-side iW709 further reduces the overall component count.

ZVS chipset supports most fast charge protocols, including USB PD 3.0 with Programmable Power Supply (PPS) and other third-party proprietary protocols. It employs switching frequencies up to 200kHz, so designers can use a much smaller and lighter transformer and smaller passive components to reduce charger size and weight. This complete solution uses built-in digital compensation, making circuit design quick and easy compared to analog approaches.

Davin Lee, Senior Vice President and General Manager of the Advanced Mixed-Signal Business Group at Dialog Semiconductor said that, “The introduction of Dialog’s patented ZVS technology builds on our extensive AC/DC expertise and expands our addressable market into higher power density PSUs. With this innovative ZVS chipset, customers can simply design higher power density chargers that are not only light-weight and ultra-small, but also very cost-effective.”